At this time fixtures can only available for pro users. The runTestSuites process will work for lite users, however it is only intended for evaluation purposes and will automatically restrict the number of tests to 5. i.e. if you have 10 tests, runTestSuites will only run the first 5.

To achieve similar behavior, you can put common setup and tear down logic into sub-processes and simply call those processes at the start and end of your tests.